18 U.S. Code§ 2261A. Stalking

(1) travels in interstate or foreign commerce or is present within the special maritime and territorial jurisdiction of the United States, or enters or leaves Indian country, with the intent to kill, injure, harass, intimidate, or place under surveillance with intent to kill, injure, harass, or intimidate another person, and in the course of, or as a result of, such travel or presence engages in conduct that—

2006—Pub. L. 109–162 amended section catchline and text generally, revising and restating former provisions relating to stalking so as to include surveillance with intent to kill, injure, harass, or intimidate which results in substantial emotional distress to a person within the purview of the offense proscribed.